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rehan243/README.md

waving hand    Typing SVG

GitHub followers  LinkedIn  Kaggle  profile visitors

AI / ML Engineer  -  LLM Systems  -  RAG  -  Multi-Agent  -  RLHF  -  MLOps
building production AI that ships to real users, not demos

open to AI/ML roles and collaborations

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about me

i'm an AI/ML engineer. right now i'm building production AI systems at Reallytics.ai and Verticiti, mostly getting large language models to do useful things in the real world. not demos, actual systems with real users and real traffic.

before this i was at Afiniti and Cloud Kinetics for a few years. fraud detection, voice analytics, enterprise search. the kind of stuff that pages you at 3am when something breaks.

honestly what keeps me going is when an agent you built solves something you never explicitly told it to do. that feeling never gets old.

what i'm working on right now:

  • multi-agent systems that don't fall apart when you chain them
  • RAG pipelines that actually return relevant results
  • writing about what i learn every day, check it out here
 coding

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featured projects  rocket

Agentic AI Workflows
8 specialized AI agents with LangChain + OpenAI function calling. multi-agent orchestration with planning loops and guardrails. the project i'm most excited about right now.

RAG Enterprise Search
production-style retrieval pipeline: hybrid dense+sparse search with FAISS and BM25, cross-encoder re-ranking, built to scale on AWS SageMaker.

Voice AI Platform
real-time voice infrastructure built for high-concurrency calls. WebSockets, Kafka, VAD, streaming STT, with a from-scratch sentiment analysis component.

LLM Fine-Tuning LoRA
fine-tuning LLaMA and Mistral with LoRA/QLoRA/PEFT, a cost-efficient alternative to hosted APIs. includes the full training loop, data pipeline, merge + quantize scripts.

RLHF LLM Optimization
full RLHF pipeline: reward model with Bradley-Terry loss, PPO trainer with KL scheduling, DPO as an alternative, plus an eval harness and safety-compliance checks.

Sentinel Fraud Detection
ensemble XGBoost + neural net with a rich engineered feature set. Redis-backed real-time velocity scoring, SHAP explainability, Kafka alert routing.

view all repositories

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tech stack

not going to pretend i use everything equally. here's what i actually reach for:

tech stack

the full picture (click to expand)
daily drivers Python, PyTorch, FastAPI, Docker, Git, VS Code
LLM and GenAI LangChain, LlamaIndex, HuggingFace Transformers, vLLM, PEFT/LoRA/QLoRA
data and vector FAISS, ChromaDB, Pinecone, PostgreSQL, MongoDB, Redis, Kafka, Elasticsearch
cloud and MLOps AWS (SageMaker, Bedrock, Lambda, ECS), GCP Vertex AI, Azure OpenAI
ML frameworks TensorFlow, scikit-learn, XGBoost, LightGBM, ONNX
infrastructure Kubernetes, Terraform, GitHub Actions, MLflow, Weights & Biases

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github stats

GitHub followers   profile views

contribution activity

contribution activity graph

my github contributions eating themselves

contribution snake

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recent writeups

i write about what i'm building and learning. nothing polished, more like notes to my future self that happen to be public.

Graph Rag And Knowledge Graphs For Llms, AI engineering article by Rehan Malik

Graph Rag And Knowledge Graphs For Llms
2026-07-16

 Model Context Protocol And Tool Use, AI engineering article by Rehan Malik

Model Context Protocol And Tool Use
2026-07-15
Agentic Coding Assistants Architecture, AI engineering article by Rehan Malik

Agentic Coding Assistants Architecture
2026-07-15

 Production Rag Pipelines With Re Ranking, AI engineering article by Rehan Malik

Production Rag Pipelines With Re Ranking
2026-07-14

📚 View all articles ->

recent activity

💬 Commented on spacy fails to specify click as a dependency even though in explosion/spaCy (2026-07-16)

💬 Commented on CUDA Out of Memory for 20B Model on 2 A100 40GB GPUs in EleutherAI/gpt-neox (2026-07-16)

💬 Commented on 训练多模态模型function_call能力，如何构建数据集进行训练 in hiyouga/LlamaFactory (2026-07-16)

💬 Commented on jax.lax.betainc does not support gradients with respect to a in jax-ml/jax (2026-07-16)

💬 Commented on InMemoryStore upsert overwrites created_at on existing keys in langchain-ai/langgraph (2026-07-16)

💬 Commented on [Bug] The model does not work correctly when calling the too in unslothai/unsloth (2026-07-16)

💬 Commented on bug: tool config does not get passed in dataset experiments in langfuse/langfuse (2026-07-16)

⭐ Starred SigNoz/signoz (2026-07-16)

what i'm reading lately

stuff i've been digging into recently. mostly papers, blog posts, and rabbit holes that kept me up too late.

🔬 LLM Fine-Tuning at Scale with LoRA

🔬 Graph RAG and Knowledge Graphs for LLMs

🔬 Real-Time AI Inference Optimization

🔬 Model Context Protocol and Tool Use

🔬 Agentic Coding Assistants Architecture

🔬 LLM Fine-Tuning at Scale with LoRA

code snippets

📌 Async Retry Pattern with Exponential Backoff, Production Pattern (Python) (2026-07-15)

📌 Real-Time Feature Store Client, Production Pattern (Python) (2026-07-15)

📌 RAG Relevance Scorer using Cross-Encoder, Production Pattern (Python) (2026-07-13)

Profile auto-updated on 2026-07-07 10:12 UTC

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if you made it this far, you should probably just say hi

connect on linkedin   follow on github

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  1. Voice-AI-Platform Voice-AI-Platform Public

    Real-time voice AI infrastructure — 500+ concurrent calls, WebSockets, Apache Kafka, gRPC/C++ with CUDA. Speech-to-text, sentiment analysis, sales insights.

    Python

  2. Agentic-AI-Workflows Agentic-AI-Workflows Public

    Production AI Agents for enterprise automation — 8+ specialized agents using LangChain, OpenAI function calling, and FastAPI. Multi-agent orchestration, tool use, planning loops, guardrails.

    Python

  3. BiiView-Object-Detection BiiView-Object-Detection Public

    Real-time object detection with Meta AI Segment Anything Model (SAM) — 90% accuracy across 11M+ images and 1.1B+ segmentation masks.

    Python

  4. Digital-People-Platform Digital-People-Platform Public

    Hyper-realistic talking avatars — SadTalker lip-sync + Microsoft SpeechT5 TTS + OpenAI conversational AI. 70% realism improvement.

    Python

  5. LLM-Fine-Tuning-LoRA LLM-Fine-Tuning-LoRA Public

    Fine-tuning LLaMA-2, Mistral with LoRA, QLoRA, PEFT — 40% cost reduction vs hosted APIs. VLLM serving with CUDA optimization on AWS SageMaker.

    Python

  6. RAG-Enterprise-Search RAG-Enterprise-Search Public

    Production RAG pipeline — enterprise knowledge retrieval across 2TB+ data using LangChain, FAISS, ChromaDB, PG-Vector with cross-encoder re-ranking. Deployed on AWS SageMaker.

    Python